The goal of the project designed by Geotectura was to build a sustainable home that would be Energy-Positive and includes excellent indoor air and light quality while reflecting the beauty of the surroundings. The challenge was even greater as the view of the sea is to the west, so traditional passive design solutions that are appropriate for the south façade were not valid in this case. An unusual geometrical optimization was needed to obtain all the passive design features while facing the west. The house is well insulated and is largely heated by the energy that is generated by body heat and household equipment.